Set up changesets for monorepo publishing

- Initialize changesets config with linked echoform packages
- Remove stale pre-release mode (pre.json)
- Fix broken 0.3.NaN versions → 0.4.0 (wmux → 0.1.0)
- Replace manual publish.yml with changesets/action release.yml
- Move @changesets/cli to devDependencies
- Add changeset/version/release scripts
- Add initial changeset for first release

Workflow: `bunx changeset` → commit → merge → CI creates Version
Packages PR → merge PR → CI publishes to npm.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: shmuel hizmi

.changeset/README.md

@@ -0,0 +1,15 @@
+# Changesets
+
+This repo uses [changesets](https://github.com/changesets/changesets) to manage versions and publish to npm.
+
+## Adding a changeset
+
+```bash
+bunx changeset
+```
+
+Follow the prompts to select which packages changed and the bump type (patch/minor/major).
+
+## Publishing
+
+Push to `master` with pending changesets → CI creates a "Version Packages" PR → merge it → CI publishes to npm.

.changeset/config.json

@@ -1,9 +1,18 @@
 {
-  "$schema": "https://unpkg.com/@changesets/config@2.2.0/schema.json",
+  "$schema": "https://unpkg.com/@changesets/config@3.1.1/schema.json",
   "changelog": "@changesets/cli/changelog",
   "commit": false,
   "fixed": [],
-  "linked": [],
+  "linked": [
+    [
+      "@playfast/echoform",
+      "@playfast/echoform-render",
+      "@playfast/echoform-bun-ws-client",
+      "@playfast/echoform-bun-ws-server",
+      "@playfast/echoform-socket-client",
+      "@playfast/echoform-socket-server"
+    ]
+  ],
   "access": "public",
   "baseBranch": "master",
   "updateInternalDependencies": "patch",

.changeset/initial-release.md

@@ -0,0 +1,11 @@
+---
+"@playfast/echoform": minor
+"@playfast/echoform-render": minor
+"@playfast/echoform-bun-ws-client": minor
+"@playfast/echoform-bun-ws-server": minor
+"@playfast/echoform-socket-client": minor
+"@playfast/echoform-socket-server": minor
+"@playfast/wmux": minor
+---
+
+Initial public release with echoform core, transport plugins, and wmux.

.changeset/pre.json

@@ -0,0 +1,48 @@
+name: Release
+
+on:
+  push:
+    branches: [master]
+
+concurrency:
+  group: release
+  cancel-in-progress: false
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      contents: write
+      pull-requests: write
+      id-token: write
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: "1.3.11"
+
+      - name: Install dependencies
+        run: bun install
+
+      - name: Build
+        run: bun run build
+
+      - name: Set wmux client URL
+        run: |
+          WMUX_CLIENT_URL="${{ vars.WMUX_CLIENT_URL || 'https://wmux.playfast.dev' }}"
+          sed -i "s|__WMUX_CLIENT_URL__|$WMUX_CLIENT_URL|g" packages/wmux/src/wmux.tsx
+
+      - name: Configure npm auth
+        run: echo "//registry.npmjs.org/:_authToken=${{ secrets.NPM_TOKEN }}" > ~/.npmrc
+
+      - name: Create Release PR or Publish
+        uses: changesets/action@v1
+        with:
+          version: bun run version
+          publish: bun run release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}

.github/workflows/publish.yml

@@ -20,12 +20,13 @@
     "lint:packages": "oxlint packages/",
     "lint:plugins": "oxlint plugins/",
     "knip": "knip",
-    "knip:fix": "knip --fix"
-  },
-  "dependencies": {
-    "@changesets/cli": "^2.25.2"
+    "knip:fix": "knip --fix",
+    "changeset": "changeset",
+    "version": "changeset version",
+    "release": "changeset publish"
   },
   "devDependencies": {
+    "@changesets/cli": "^2.25.2",
     "@typescript/native-preview": "^7.0.0-dev.20260323.1",
     "knip": "^5.0.0",
     "oxlint": "^0.13.0",

.github/workflows/release.yml

@@ -1,6 +1,6 @@
 {
   "name": "@playfast/echoform",
-  "version": "0.3.NaN",
+  "version": "0.4.0",
   "description": "run your react app logic on the server",
   "type": "module",
   "exports": {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@playfast/echoform-render",
-  "version": "0.3.NaN",
+  "version": "0.4.0",
   "description": "render react tree to nothing!",
   "type": "module",
   "exports": {

packages/fullstack/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@playfast/wmux",
-  "version": "0.0.2",
+  "version": "0.1.0",
   "description": "Web terminal multiplexer for dev servers",
   "type": "module",
   "exports": {